Why is it so expensive to be healthy?

Why is it so damn expensive to try and be healthy? 
It honestly must be a conspiracy to keep you fat and unhealthy. Like you can buy 4 cheese burgers for $3.00 but its $5 for a salad that was prepared and packaged 5 days ago.

Then you buy vitamins and supplements to try and keep healthy too and you are looking at upwards of $8 per bottle. And  then every fad diet has its own branded "specially formulated" pill to take, so everyone jumping on that bandwagon is going to buy that pill which chances are has nothing more than a multivitamin or the equivalent of a Flintstones Children's Chewable but in a fancy flashy package.

At day 3 of me getting back out on the trails and doing my walking, and looking at the mountain of vitamin bottles and supplements that I am taking. Im just thinking of how much weight my wallet is losing in the pursuit of me losing weight. 

Regardless of where I purchase my supplements (mostly Dollar Tree) it still adds up. But what do you do? Got to keep pushing on right?